Farr X2

Liquid - that's the sail drive on the left of your photo. The rest isn't clear enough to see anything else.

Those look like bolts in the "before" photo, not nuts but still a bit fuzzy to be sure.

In the interior on the beach shot sure looks like no bolts in the photo.

You'd be very surprised if threads stripped out of cast iron if they are appropriately sized. Just so unlikely as it's about the same strength as stainless steel bolts if they are garden variety 316 or similar.

So... bolts not torqued enough, came loose and keel just fell out?
Possibly.
Another guess is : the tiny wedge snapped off (if it's made out of cast iron, it's not so ductile as forged steel to just bend without breaking), then bolts came off from the turtled hull...nothing to keep them in place without the wedged-in keel...unless some piece remained attached to the bolt threads.
 
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LeoV

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Interior photo when boot in good condition shows a round plate with goop and two bolts (but even could be nuts).
Wreckage photo, it looks like no plate. But need a more close up photo to really make a conclusion.
 

RIGO

Member
Funny - looks as if someone had souvenired the prop by then...
54AD2ADC-B10F-46A2-8D88-BC7084487B9C.png

Prop definitely still there prior to salvage
 
It looks like the keel may be similar to the Farr 280 keel as far as how it is attached. Found this manual showing how it is attached:
Interesting there is 6 mm gap between keel and hull. Not a little play for the keel to wobble (possibly around +/-1°). This means significant bending for the bolts if not properly torqued (guide says 99 Nm)...loose bolts might be a possibility as Zonker said
 

Zonker

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Yeah but I meant "not torqued enough" in that sense. Or just loosened due to vibrations/impacts (hitting lots of waves). Interesting topic - transverse vibrations in a bolted joint (like a keel fin bouncing sideways) are MUCH worse than axial vibrations. Loc-tite or safety wire or cotter pin your mission critical bolts/nuts. Airplane and race car people learned this a long time ago. Marine people not so much.

You wouldn't want much of a gap between keel head and keel socket. Doesn't transfer the load very well.
 

Hitchhiker

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Glad the crew are recovered. Job Well Done to the crew of HMAS Brisbane for the rescue.

Farr X2 Australia said "The boat was sailing into a building breeze and significant seaway when the keel attachment failed resulting in a capsize". (https://www.yachtingworld.com/news/...ed-hull-of-new-farr-x2-after-keel-loss-139333).

Interesting to note that Hull #2 which was slated to race in the Pac Cup withdrew, prior to the loss of Hull #1. Have to think they would have had to withdraw after this incident.

Finally, I note that the shitter is still intact in the boat. Which has to lead to the obvious conclusion that if the keel had been installed as well as the shitter was, this thread would not exist. (jkg).

shitter intact (2).png
 

Gorn FRANTIC!!

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Glad the crew are recovered. Job Well Done to the crew of HMAS Brisbane for the rescue.

Farr X2 Australia said "The boat was sailing into a building breeze and significant seaway when the keel attachment failed resulting in a capsize". (https://www.yachtingworld.com/news/...ed-hull-of-new-farr-x2-after-keel-loss-139333).
Interesting that the quote above in that article seems to be the complete opposite regarding conditions to what the statement from Nexba earlier in the article says.
 

Hitchhiker

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Interesting that the quote above in that article seems to be the complete opposite regarding conditions to what the statement from Nexba earlier in the article says.
Presumably this, you silly bunt. “Around 1am on Saturday morning as the team made their way home to Sydney in light to moderate breeze and 1-2m seas, the boat capsized.
 

Ex Machina

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Yeah but I meant "not torqued enough" in that sense. Or just loosened due to vibrations/impacts (hitting lots of waves). Interesting topic - transverse vibrations in a bolted joint (like a keel fin bouncing sideways) are MUCH worse than axial vibrations. Loc-tite or safety wire or cotter pin your mission critical bolts/nuts. Airplane and race car people learned this a long time ago. Marine people not so much.

You wouldn't want much of a gap between keel head and keel socket. Doesn't transfer the load very well.
They would’ve known if the keel bolts were coming loose in a 1-2M swell . I’ve had two boats with lift keels and if the keel wasn’t bolted down snuggly even the smallest movement of the keel in a seaway is very noticeably transmitted through the hull . I reckon they pulled out of whatever they were tapped into or rather the keel did
 




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